Comparison · Batteries

Samsung INR21700-40T or LiitoKala Lii-40A 21700 4000mAh

Two models side by side: measurements taken by the author in their reviews, and their conclusions. The better value in each row is highlighted.

In brief: Based on review measurements: Capacity: LiitoKala Lii-40A 21700 4000mAh (4074 mAh vs. 4070); Capacity at high current: LiitoKala Lii-40A 21700 4000mAh (4041 mAh vs. 3819); Test current: Samsung INR21700-40T (37 A vs. 30).

Model	Samsung INR21700-40T2019Read review →	LiitoKala Lii-40A 21700 4000mAh2018Read review →
Current, A	45	40
Capacity, mAh	4070	4074
Capacity at high current, mAh	3819	4041
Test current, A	37	30
Review conclusion	Recommended	With reservations

Only in one review: Voltage 3.7 V (LiitoKala Lii-40A 21700 4000mAh); Energy 14.972 Wh (LiitoKala Lii-40A 21700 4000mAh); Temperature rise 90 °C (LiitoKala Lii-40A 21700 4000mAh).

Samsung INR21700-40T: It handled high currents well: about 95°C at 30 A and around 100°C in the test reaching 37 A.

LiitoKala Lii-40A 21700 4000mAh: Capacity meets the rating, but the claimed continuous discharge current is questionable.

Figures were taken from the review text and checked against the quoted passages. Measurement conditions differ between reviews, so read the reviews yourself before buying. Prices at the time of review.